loncom/lonc - diff

Return to lonc CVS log

Up to [LON-CAPA] / loncom

Diff for /loncom/Attic/lonc between versions 1.18 and 1.24

version 1.18, 2001/11/26 22:20:26	version 1.24, 2002/02/06 14:13:19
Line 5	Line 5
# provides persistent TCP connections to the other servers in the network	# provides persistent TCP connections to the other servers in the network
# through multiplexed domain sockets	# through multiplexed domain sockets
#	#
	# $Id$
	#
	# Copyright Michigan State University Board of Trustees
	#
	# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
	#
	# LON-CAPA is free software; you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation; either version 2 of the License, or
	# (at your option) any later version.
	#
	# LON-CAPA is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	# GNU General Public License for more details.
	#
	# You should have received a copy of the GNU General Public License
	# along with LON-CAPA; if not, write to the Free Software
	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	#
	# /home/httpd/html/adm/gpl.txt
	#
	# http://www.lon-capa.org/
	#
# PID in subdir logs/lonc.pid	# PID in subdir logs/lonc.pid
# kill kills	# kill kills
# HUP restarts	# HUP restarts
Line 15	Line 39
# 2/8,7/25 Gerd Kortemeyer	# 2/8,7/25 Gerd Kortemeyer
# 12/05 Scott Harrison	# 12/05 Scott Harrison
# 12/05 Gerd Kortemeyer	# 12/05 Gerd Kortemeyer
	# YEAR=2001
# 01/10/01 Scott Harrison	# 01/10/01 Scott Harrison
# 03/14/01,03/15,06/12,11/26 Gerd Kortemeyer	# 03/14/01,03/15,06/12,11/26,11/27,11/28 Gerd Kortemeyer
	# 12/20 Scott Harrison
#	#
# based on nonforker from Perl Cookbook	# based on nonforker from Perl Cookbook
# - server who multiplexes without forking	# - server who multiplexes without forking
Line 119 sub REAPER { # ta	Line 145 sub REAPER { # ta

sub HUNTSMAN { # signal handler for SIGINT	sub HUNTSMAN { # signal handler for SIGINT
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children	local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
map {	foreach (keys %children) {
$wasserver=$children{$_};	$wasserver=$children{$_};
&status("Closing $wasserver");	&status("Closing $wasserver");
&logthis('Closing '.$wasserver.': '.&subreply('exit',$wasserver));	&logthis('Closing '.$wasserver.': '.&subreply('exit',$wasserver));
&status("Kill PID $_ for $wasserver");	&status("Kill PID $_ for $wasserver");
kill ('INT',$_);	kill ('INT',$_);
} keys %children;	}
my $execdir=$perlvar{'lonDaemons'};	my $execdir=$perlvar{'lonDaemons'};
unlink("$execdir/logs/lonc.pid");	unlink("$execdir/logs/lonc.pid");
&logthis("<font color=red>CRITICAL: Shutting down</font>");	&logthis("<font color=red>CRITICAL: Shutting down</font>");
Line 134 sub HUNTSMAN { # si	Line 160 sub HUNTSMAN { # si

sub HUPSMAN { # signal handler for SIGHUP	sub HUPSMAN { # signal handler for SIGHUP
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children	local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
map {	foreach (keys %children) {
$wasserver=$children{$_};	$wasserver=$children{$_};
&status("Closing $wasserver");	&status("Closing $wasserver");
&logthis('Closing '.$wasserver.': '.&subreply('exit',$wasserver));	&logthis('Closing '.$wasserver.': '.&subreply('exit',$wasserver));
&status("Kill PID $_ for $wasserver");	&status("Kill PID $_ for $wasserver");
kill ('INT',$_);	kill ('INT',$_);
} keys %children;	}
&logthis("<font color=red>CRITICAL: Restarting</font>");	&logthis("<font color=red>CRITICAL: Restarting</font>");
unlink("$execdir/logs/lonc.pid");	unlink("$execdir/logs/lonc.pid");
my $execdir=$perlvar{'lonDaemons'};	my $execdir=$perlvar{'lonDaemons'};
Line 151 sub checkchildren {	Line 177 sub checkchildren {
&initnewstatus();	&initnewstatus();
&logstatus();	&logstatus();
&logthis('Going to check on the children');	&logthis('Going to check on the children');
map {	foreach (sort keys %children) {
sleep 1;	sleep 1;
unless (kill 'USR1' => $_) {	unless (kill 'USR1' => $_) {
&logthis ('Child '.$_.' is dead');	&logthis ('Child '.$_.' is dead');
&logstatus($$.' is dead');	&logstatus($$.' is dead');
}	}
} sort keys %children;	}
}	}

sub USRMAN {	sub USRMAN {
Line 182 sub subreply {	Line 208 sub subreply {
Type => SOCK_STREAM,	Type => SOCK_STREAM,
Timeout => 10)	Timeout => 10)
or return "con_lost";	or return "con_lost";
print $sclient "$cmd\n";
my $answer=<$sclient>;
chomp($answer);	$SIG{ALRM}=sub { die "timeout" };
if (!$answer) { $answer="con_lost"; }	$SIG{__DIE__}='DEFAULT';
	eval {
	alarm(10);
	print $sclient "$cmd\n";
	$answer=<$sclient>;
	chomp($answer);
	alarm(0);
	};
	if ((!$answer) \|\| ($@=~/timeout/)) { $answer="con_lost"; }
	$SIG{ALRM}='DEFAULT';
	$SIG{__DIE__}=\&catchexception;
} else { $answer='self_reply'; }	} else { $answer='self_reply'; }
return $answer;	return $answer;
}	}
Line 344 unless (	Line 380 unless (
sleep($st);	sleep($st);
exit;	exit;
};	};
# --------------------------------------- Send a ping to make other end do USR1	# ----------------------------------------------------------------- Init dialog

&status("Init dialogue: $conserver");	&status("Init dialogue: $conserver");

	$SIG{ALRM}=sub { die "timeout" };
	$SIG{__DIE__}='DEFAULT';
	eval {
	alarm(60);
print $remotesock "init\n";	print $remotesock "init\n";
$answer=<$remotesock>;	$answer=<$remotesock>;
print $remotesock "$answer";	print $remotesock "$answer";
$answer=<$remotesock>;	$answer=<$remotesock>;
chomp($answer);	chomp($answer);
	alarm(0);
	};
	$SIG{ALRM}='DEFAULT';
	$SIG{__DIE__}=\&catchexception;

	if ($@=~/timeout/) {
	&logthis("Timed out during init: $conserver");
	exit;
	}


&logthis("Init reply for $conserver: >$answer<");	&logthis("Init reply for $conserver: >$answer<");
if ($answer ne 'ok') {	if ($answer ne 'ok') {
my $st=120+int(rand(240));	my $st=120+int(rand(240));
Line 398 if ($cipher=new IDEA $cipherkey) {	Line 449 if ($cipher=new IDEA $cipherkey) {
@allbuffered=grep /\.$conserver$/, readdir DIRHANDLE;	@allbuffered=grep /\.$conserver$/, readdir DIRHANDLE;
closedir(DIRHANDLE);	closedir(DIRHANDLE);
my $dfname;	my $dfname;
map {	foreach (@allbuffered) {
&status("Sending delayed $conserver $_");	&status("Sending delayed $conserver $_");
$dfname="$path/$_";	$dfname="$path/$_";
&logthis($dfname);	&logthis($dfname);
Line 422 if ($cipher=new IDEA $cipherkey) {	Line 473 if ($cipher=new IDEA $cipherkey) {
}	}
$cmd="enc:$cmdlength:$encrequest\n";	$cmd="enc:$cmdlength:$encrequest\n";
}	}
	$SIG{ALRM}=sub { die "timeout" };
	$SIG{__DIE__}='DEFAULT';
	eval {
	alarm(60);
print $remotesock "$cmd\n";	print $remotesock "$cmd\n";
$answer=<$remotesock>;	$answer=<$remotesock>;
chomp($answer);	chomp($answer);
if ($answer ne '') {	alarm(0);
	};
	$SIG{ALRM}='DEFAULT';
	$SIG{__DIE__}=\&catchexception;

	if (($answer ne '') && ($@!~/timeout/)) {
unlink("$dfname");	unlink("$dfname");
&logthis("Delayed $cmd to $conserver: >$answer<");	&logthis("Delayed $cmd to $conserver: >$answer<");
&logperm("S:$conserver:$bcmd");	&logperm("S:$conserver:$bcmd");
}	}
} @allbuffered;	}

# ------------------------------------------------------- Listen to UNIX socket	# ------------------------------------------------------- Listen to UNIX socket
&status("Opening socket $conserver");	&status("Opening socket $conserver");
Line 511 while (1) {	Line 570 while (1) {

# Any complete requests to process?	# Any complete requests to process?
foreach $client (keys %ready) {	foreach $client (keys %ready) {
handle($client);	handle($client,$conserver);
}	}

# Buffers to flush?	# Buffers to flush?
foreach $client ($select->can_write(1)) {	foreach $client ($select->can_write(1)) {
# Skip this client if we have nothing to say	# Skip this client if we have nothing to say
next unless exists $outbuffer{$client};	next unless exists $outbuffer{$client};

$rv = $client->send($outbuffer{$client}, 0);	$rv = $client->send($outbuffer{$client}, 0);
unless (defined $rv) {	unless (defined $rv) {
# Whine, but move on.	# Whine, but move on.
Line 548 while (1) {	Line 606 while (1) {
}	}
}	}
}	}
	}
# ------------------------------------------------------- End of make_new_child	# ------------------------------------------------------- End of make_new_child

# handle($socket) deals with all pending requests for $client	# handle($socket) deals with all pending requests for $client
Line 556 sub handle {	Line 614 sub handle {
# requests are in $ready{$client}	# requests are in $ready{$client}
# send output to $outbuffer{$client}	# send output to $outbuffer{$client}
my $client = shift;	my $client = shift;
	my $conserver = shift;
my $request;	my $request;

foreach $request (@{$ready{$client}}) {	foreach $request (@{$ready{$client}}) {
Line 576 sub handle {	Line 635 sub handle {
}	}
$request="enc:$cmdlength:$encrequest\n";	$request="enc:$cmdlength:$encrequest\n";
}	}
	# --------------------------------------------------------------- Main exchange
	$SIG{ALRM}=sub { die "timeout" };
	$SIG{__DIE__}='DEFAULT';
	eval {
	alarm(300);
&status("Sending $conserver: $request");	&status("Sending $conserver: $request");
	&logthis("Sending $conserver: $request");
print $remotesock "$request";	print $remotesock "$request";
&status("Waiting for reply from $conserver: $request");	&status("Waiting for reply from $conserver: $request");
	&logthis("Waiting for reply from $conserver: $request");
$answer=<$remotesock>;	$answer=<$remotesock>;
&status("Received reply: $request");	&status("Received reply: $request");
	&logthis("Received reply $conserver: $answer");
	alarm(0);
	};
	if ($@=~/timeout/) {
	$answer='';
	&logthis(
	"<font color=red>CRITICAL: Timeout $conserver: $request</font>");
	}
	$SIG{ALRM}='DEFAULT';
	$SIG{__DIE__}=\&catchexception;


if ($answer) {	if ($answer) {
if ($answer =~ /^enc/) {	if ($answer =~ /^enc/) {
my ($cmd,$cmdlength,$encinput)=split(/:/,$answer);	my ($cmd,$cmdlength,$encinput)=split(/:/,$answer);
Line 600 sub handle {	Line 678 sub handle {
}	}

# ===================================================== Done processing request	# ===================================================== Done processing request
	&logthis("Completed $conserver: $request");
}	}
delete $ready{$client};	delete $ready{$client};
&status("Completed $conserver: $request");	&status("Completed $conserver: $request");
# -------------------------------------------------------------- End non-forker	# -------------------------------------------------------------- End non-forker
}	}
# ---------------------------------------------------------- End make_new_child	# ---------------------------------------------------------- End make_new_child
}

# nonblock($socket) puts socket into nonblocking mode	# nonblock($socket) puts socket into nonblocking mode
sub nonblock {	sub nonblock {
Line 620 sub nonblock {	Line 698 sub nonblock {
or die "Can't make socket nonblocking: $!\n";	or die "Can't make socket nonblocking: $!\n";
}	}

	# ----------------------------------- POD (plain old documentation, CPAN style)

	=head1 NAME

	lonc - LON TCP-MySQL-Server Daemon for handling database requests.

	=head1 SYNOPSIS

	Should only be run as user=www. This is a command-line script which
	is invoked by loncron.

	=head1 DESCRIPTION

	Provides persistent TCP connections to the other servers in the network
	through multiplexed domain sockets

	PID in subdir logs/lonc.pid
	kill kills
	HUP restarts
	USR1 tries to open connections again

	=head1 README

	Not yet written.

	=head1 PREREQUISITES

	POSIX
	IO::Socket
	IO::Select
	IO::File
	Socket
	Fcntl
	Tie::RefHash
	Crypt::IDEA

	=head1 COREQUISITES

	=head1 OSNAMES

	linux

	=head1 SCRIPT CATEGORIES

	Server/Process

	=cut

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

Removed from v.1.18
changed lines
	Added in v.1.24